/* quine.c by joey richards:          *
 * readable self-replicating software */
#include <stdio.h>

/* N=number of strings */
#define N 40
/* M>maximum string length */
#define M 60
char *s[] = {
  "char t[2*M];",
  "",
  "/* this function escapes a backslash or quote in a string",
  " * by placing a backslash in front of it                  */",
  "char *escape( char *s )",
  "{",
  "  char *p=t;",
  "  while( *s != 0 )",
  "  {",
  "    if( (*s=='\\\\') || (*s=='\"') )",
  "      *(p++)='\\\\';",
  "    *p=*s;",
  "    p++;",
  "    s++;",
  "  }",
  "  *p=0;",
  "  return t;",
  "}",
  "",
  "int main( void )",
  "{",
  "  int i;",
  "",
  "  printf( \"/* quine.c by joey richards:          *\\n\" );",
  "  printf( \" * readable self-replicating software */\\n\" );",
  "  printf( \"#include <stdio.h>\\n\" );",
  "  printf( \"\\n\" );",
  "  printf( \"/* N=number of strings */\\n\" );",
  "  printf( \"#define N %d\\n\", N );",
  "  printf( \"/* M>maximum string length */\\n\" );",
  "  printf( \"#define M %d\\n\", M );",
  "  printf( \"char *s[] = {\\n\" );",
  "  for( i=0; i<N-1; i++ )",
  "    printf( \"  \\\"%s\\\",\\n\", escape(s[i]) );",
  "  printf( \"  \\\"%s\\\"\\n\", escape(s[i]) );",
  "  printf( \"};\\n\" );",
  "  for( i=0; i<N; i++ )",
  "    printf( \"%s\\n\", s[i] );",
  "  return 0;",
  "}"
};
char t[2*M];

/* this function escapes a backslash or quote in a string
 * by placing a backslash in front of it                  */
char *escape( char *s )
{
  char *p=t;
  while( *s != 0 )
  {
    if( (*s=='\\') || (*s=='"') )
      *(p++)='\\';
    *p=*s;
    p++;
    s++;
  }
  *p=0;
  return t;
}

int main( void )
{
  int i;

  printf( "/* quine.c by joey richards:          *\n" );
  printf( " * readable self-replicating software */\n" );
  printf( "#include <stdio.h>\n" );
  printf( "\n" );
  printf( "/* N=number of strings */\n" );
  printf( "#define N %d\n", N );
  printf( "/* M>maximum string length */\n" );
  printf( "#define M %d\n", M );
  printf( "char *s[] = {\n" );
  for( i=0; i<N-1; i++ )
    printf( "  \"%s\",\n", escape(s[i]) );
  printf( "  \"%s\"\n", escape(s[i]) );
  printf( "};\n" );
  for( i=0; i<N; i++ )
    printf( "%s\n", s[i] );
  return 0;
}